This might be a question for your Android developers…
I have a tiny handheld bluetooth remote which is great for listening to LingQ without having to hold my phone open all the time. I can jump back and forth through my playlist while out walking.
However, I really need to be able to map a button to the <5seconds option. It means I can walk and repeat sections. Does the Android app have a keyboard shortcut for <5sec that I can map my remote to?